The Music Producers Guild (MPG) in partnership with the European Broadcast Union (EBU) have now standardized a metadata field for the International Standard Recording Code (ISRC) in wav files! This issue has been a long time overdue, but now finally gained enough traction to make it into a standard. The ISRC can now be embedded in wav files inside the core metadata. This means it will follow the file where ever it goes. We also now have software that is able to add this info to your mastered wav files, so we can offer this service to clients.
This question has come up with relative frequency, so I'm going to write the step-by-step directions to let you get your reference CD into your computer as .wav files or mp3 files.
These step by step directions are for converting a disc to .wav files, but the steps will be similar for converting to MP3 too.